How to set the fill color of Ellipse using FabricJS?

In this tutorial, we are going to learn how we can change the appearance of an Ellipse object by changing its fill color using FabricJS. Ellipse is one of the various shapes provided by FabricJS. In order to create an ellipse, we will have to create an instance of fabric.Ellipse class and add it to the canvas. We can change the fill color by using the fill property which allows us to specify the color of the object's fill.

Syntax

new fabric.Ellipse({ fill: String }: Object)

Parameters

options (optional) − This parameter is an Object which provides additional customizations to our ellipse. Using this parameter color, cursor, stroke width and a lot of other properties can be changed related to the object of which fill is a property.

Options Keys

fill − This property accepts a String value which allows us to change an object's fill color. Its default value is rgb(0,0,0) which is the color black.

Example 1

Default fill color of an ellipse object

Let's see a code that shows us the default fill color of an ellipse object in FabricJS. If we completely skip the fill property while creating an ellipse object, it will be rendered black.

<!DOCTYPE html>
<html>
   <head>
      <!-- Adding the Fabric JS Library-->
      <script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
   </head>

   <body>
      <h2>How to set the fill color of Ellipse using FabricJS?</h2>
      <p>Observe the ellipse is rendered black as we have not applied the <b>fill</b> property. This is the default fill color. </p>
      <canvas id="canvas"></canvas>

      <script>
         // Initiate a canvas instance
         var canvas = new fabric.Canvas("canvas");

         // Initiate an ellipse instance
         var ellipse = new fabric.Ellipse({
            left: 215,
            top: 100,
            rx: 90,
            ry: 50,
            stroke: "#c154c1",
            strokeWidth: 5,
         });

         // Adding it to the canvas
         canvas.add(ellipse);
         canvas.setWidth(document.body.scrollWidth);
         canvas.setHeight(250);
      </script>
   </body>
</html>

Example 2

Passing the fill property as key

We can also assign the fill property with any color name or an RGBA value. In this example, we have assigned it a value of "skyBlue" which thus changes the fill color accordingly.

<!DOCTYPE html>
<html>
   <head>
      <!-- Adding the Fabric JS Library-->
      <script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
   </head>

   <body>
      <h2>How to set the fill color of Ellipse using FabricJS?</h2>
      <p>Here we have used the <b>fill</b> property and used skyBlue color.</p>
      <canvas id="canvas"></canvas>
     
      <script>
         // Initiate a canvas instance
         var canvas = new fabric.Canvas("canvas");

         // Initiate an ellipse instance
         var ellipse = new fabric.Ellipse({
            left: 215,
            top: 100,
            fill: "skyBlue",
            rx: 90,
            ry: 50,
            stroke: "#c154c1",
            strokeWidth: 5,
         });

         // Adding it to the canvas
         canvas.add(ellipse);
         canvas.setWidth(document.body.scrollWidth);
         canvas.setHeight(250);
      </script>
   </body>
</html>